396
0
21
527
2
21
563
0
21
610
0
21
454
0
21
451
0
21
533
2
20
696
0
20
896
0
20
691
2
20
408
0
20
674
3
20
315
0
20
610
0
20
435
2
20
671
0
20
667
1
20
431
0
20
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Keyword(s): 中1数学